JP2008034998A - Automatic violin - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide constitution capable of easily and automatically play a violin with a stereophonic sound source by entering a stereophonic audio signal. <P>SOLUTION: A vibration part having two piezoelectric diaphragms which vibrate with the stereophonic audio signal is fixed while shouldered on a bridge of the violin through a structure to stereophonically excite the bridge, and then a top plate, a sound post, a bass bar, and a back plate are systematically excited exactly in the same manner with normal string vibrations to automatically play the violin. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention belongs to the technical field of automatically playing a single violin by stereo audio electric signals.

  A speaker that converts a sound electric signal into a sound wave is generally used in a speaker box made of wood or synthetic resin. However, this configuration is a fact commonly known in the art that the vibration of the speaker cone induces the natural vibration of the box, and the induced vibration generates a side effect sound and distorts the original sound. In order to reduce this side-effect sound, various technical ideas have been made so far, but satisfactory results have not always been obtained.

On the other hand, a technique of using a musical instrument for a speaker box is disclosed (Patent Documents 1 and 2).
The first technique (Patent Document 1) is a player apparatus technique in which a vibrating portion of a drive coil that converts audio current into mechanical vibration and a piece of a violin instrument are connected by a rod-shaped member. This technique had the following problems:
(1) A rod-like member is connected to the vibration portion of the drive coil of the speaker housed in the housing, and its tip is connected to the piece, but if the connection with the piece is completely fixed, Since both instruments are fixed, the vibration part cannot vibrate in principle. Therefore, the connection with the piece required a special technique for transmitting vibration.
(2) Since the casing and the musical instrument are separate bodies, they were not portable.
(3) Since the casing and the musical instrument are separate, both must be installed on a desk or the like so that the upper and lower levels of the drive coil and musical instrument piece match, and each installation requires troublesome adjustments. It was.
(4) Due to the configuration in which the casing and the musical instrument are connected side by side, the stereo performance configuration from the same sound source is extremely cumbersome.
(5) The piece of the musical instrument is made in a shape that transmits the vibration of the hook stretched on the upper edge to the front plate, but with this technique the rod-shaped member is connected to the side edge of the piece, so the piece functions normally Without, there was a problem with faithful sound reproduction.

The second technique (Patent Document 2) is a loudspeaker musical instrument technique in which an external force from an electronic amplification device is applied to a musical instrument. This technique had the following problems:
(1) Since there was no specific explanation of the external force from the electronic amplifying device, it was not reproducible.
(2) There is no specific explanation about the means for transmitting external force to the musical instrument. In the description of the embodiment, a transmission unit is provided at the base of the soul column, or the soul column is vibrated from the lateral direction, but the soul column transmits the vertical vibration of the front panel of the instrument to the back plate. However, if the transmission part is provided at the base of the soul column, the transmission of vibration to the back plate is significantly hindered. Moreover, even if vibration is applied to the soul column from the lateral direction, normal longitudinal vibration cannot be transmitted to the front and back plates.
(3) The means for applying the external force of this technology to the violin cannot be attached to the ready-made violin.

  Recently, many techniques using a piezoelectric vibrating body for a vibrating portion of a speaker have been disclosed (for example, Patent Document 3). In this technique, for example, a central portion of a bimorph type piezoelectric ceramic piezoelectric diaphragm is attached to an acoustic diaphragm via a support member. A through hole is provided in the center of the piezoelectric diaphragm and the support member is inserted. In this technique, an acoustic diaphragm is mechanically vibrated to generate air vibration, and functions as a sounding body. In this technique, a piezoelectric diaphragm and an acoustic diaphragm are integrated to form a speaker. In addition, a product that does not include the above-described acoustic diaphragm but has an adsorption board or the like as a support member and uses any object such as a desk or guitar as an acoustic diaphragm has appeared on the market.

If this piezoelectric diaphragm with a suction plate is attached to the body of a violin and the violin is viewed as a sounding body, it produces a very distorted sound. In particular, when two piezoelectric diaphragms, each corresponding to a stereo RL audio signal, are affixed to the violin torso, it is more difficult to hear and an unpleasant distortion sound is emitted. The cause is due to the structural characteristics of the violin instrument. In a violin genus instrument, a piece is excited by the vibration of a spear that is rubbed with a bow, and the piece transmits vibrations to the front plate to vibrate the front plate, and also transmits vibrations to the back plate through the soul column. Therefore, when the front and back plates are directly vibrated by the piezoelectric diaphragm, the violin systematic sounding structure does not function and mutual interference and cancellation occur. In addition to the structural elements described above, Riki also plays a major role in violin genus instruments. Due to these special structures, it is an absolute requirement to excite the piece in order to produce a violin genius instrument with good sound (Non-patent Document 1).
Japanese Patent Laid-Open No. 9-134168 Japanese Patent Laid-Open No. 11-122687 Japanese Patent Laid-Open No. 2000-253492 C. M.M. Hutchins "Violin Acoustics", Science, December 1981

  The problem to be solved is that it is not portable, the installation is troublesome, and the violin stereo sound source that is faithful to the original sound cannot be played.

In order to solve the above-mentioned problems, the automatic violin according to claim 1 of the present invention is an automatic violin in which one violin performs with a stereo sound source, and the disc-shaped R vibrates in response to a stereo R audio signal. A rod-shaped structure that penetrates and fixes the center portion of the piezoelectric diaphragm and the disk-shaped L piezoelectric diaphragm that vibrates in response to the stereo L audio signal to the skewer is detachable by a clip provided at the tip. The structure fixed to the upper edge portion is characterized in that a piece is excited by a mechanical vibration of each of the R piezoelectric diaphragm and the L piezoelectric diaphragm and played by a stereo sound source.
The automatic violin according to claim 2 of the present invention is an automatic violin in which one violin performs with a stereo sound source, one end having two branched ends, and each end having stereo R sound. The other end of the structure that fixes the central portion of the disc-shaped R piezoelectric diaphragm that vibrates in response to the signal and the central portion of the disc-shaped L piezoelectric diaphragm that vibrates in response to the stereo L audio signal, With a structure that is fixed to the upper edge of the violin piece so as to be detachable by a clip portion provided at the tip, the piece is excited by the mechanical vibration of each of the R piezoelectric diaphragm and the L piezoelectric diaphragm and played with a stereo sound source. It is characterized by performing.

  In the automatic violin of the present invention, two piezoelectric diaphragms that vibrate in response to stereo audio electric signals are fixed to the upper edge of the piece, so that a single violin can be automatically played with a stereo sound source faithful to the original sound, and There is an advantage that it is easy to attach and detach and has high portability.

  For the purpose of being able to perform automatically with a stereo sound source that is faithful to the original sound with one violin, easy to attach and detach, and to have high portability, two piezoelectric diaphragms for stereo are connected to the upper edge of the violin piece through the structure. Realized by a structure that is detachably fixed to the part.

  FIG. 1 is a view for explaining a first embodiment of an automatic violin according to the present invention, in which A is an overall sectional view and B is a side view of a vibrating part and a structure. In the figure, 1 is a vibrating section, 2 is a piezoelectric diaphragm, 2-1 is a stereo R diaphragm, 2-2 is a stereo L diaphragm, 2-3 is a stereo R audio signal line, and 2-4 is a stereo L audio signal. Line. Reference numeral 3 denotes a structure that transmits mechanical vibrations and fixes the vibration unit 1 to the piece. Reference numeral 3-1 denotes a fixed shaft that penetrates and fixes the piezoelectric diaphragms 2-1 and 2-2. Reference numeral 3-2 denotes a diaphragm. 2-1 and 2-2 are transmission shafts for transmitting vibrations, 3-3 is a clip part for sandwiching the upper edge of the piece, 3-4 is a screw for fastening the clip, and 3-5 is a slit for inserting the side face of the piece. Reference numeral 4 denotes four ridges 4-1, 4-2, 4-3, and 4-4 stretched on the piece. Reference numeral 5 denotes a piece, and reference numerals 5-1 and 5-2 denote leg portions in contact with the front plate. 6 is a torso, 6-1 is a front plate, 6-2 is a side plate, 6-3 is a back plate, 6-4 is an f hole, 6-5 is a soul column, and 6-6 is a power tree.

  Hereinafter, functions of the first embodiment will be described. As shown in FIG. 1A, the structure 3 fixes the vibration part 1 to the upper edge of the violin piece. As a result, the piezoelectric diaphragms 2-1 and 2-2 of the vibration unit 1 try to vibrate by stereo audio signals from the audio signal lines 2-2 and 2-4. The piezoelectric diaphragms 2-1 and 2-2 themselves vibrate. This vibration causes the structure 3 to vibrate and excites the piece in exactly the same way as the reed vibration when the structure 3 bounces the reed, so that the violin is played correctly by the vibration of the vibration part 1.

  In the present embodiment, since the vibration part 1 and the structure 3 are integrated, the upper edge part of the piece is sandwiched by the clip part 3-3, and the fixing screw 3-4 can be fastened, so that it can be attached to the piece very easily. Moreover, since it can be easily removed, it can be set up immediately at any location and completed.

Next, the principle and effect of stereo sound source performance with one violin will be described. Usually, stereo sound sources are reproduced by generating directional air vibrations from left and right speakers, or wearing headphone speakers in both ears. These are methods for generating a three-dimensional effect in the brain by listening to sounds from left and right with slightly different phases and volumes. Even a solo sound source such as a violin or piano is normally recorded or recorded in stereo, and these sound sources are also reproduced by a stereo device and exhibit a stereoscopic effect that cannot be obtained by monaural reproduction.
On the other hand, in the present invention, in view of the fact that a violin genus instrument can perform multiple sound performances by multiple rubs, a stereo sound source performance by a single instrument is realized by exciting a piece with a stereo RL audio signal. is doing. The principle is that the violin produces RL in response to both of the RL audio signals at the same time, so that a three-dimensional effect is generated in the brain listening to one stereo sound source performance.

  Next, a second embodiment of the automatic violin of the present invention will be described with reference to FIGS. 2A is a perspective view, and B is a side view. In FIG. 2A, 1 is a vibrating section, 2 is a piezoelectric diaphragm, 2-1 is a stereo R diaphragm, 2-2 is a stereo L diaphragm, 2- 3 is a stereo R audio signal line, 2-4 is a stereo L audio signal line, and the piezoelectric diaphragms 2-1 and 2-2 are fixed to a common structure 3, respectively.

  Each part of the structure 3 is a transmission shaft for fixing the stereo R diaphragm 2-1 at 3-1, and a transmission shaft for fixing the stereo L diaphragm 2-2 at 3-1. These shafts are fixed to a mounting base 3-3. The mounting base 3-3 includes a clip portion 1 of 3-4 and a clip portion 2 of 3-5, and a piece (see FIG. 1) 5) Fixed to the upper edge.

  FIG. 2B shows the tightening operation to the piece. When the tightening screw 3-6 is tightened, the upper arm of the clip portion 2 (3-5) is pushed down, and the lower arm that hangs at a right angle tightens the upper edge portion 4 of the piece between the clip portion 1 (3-4). I am going to go.

  In this embodiment, as in the first embodiment, the audio signal RL from the stereo sound source can be played with the stereo sound source. Since the principle and effect of stereo sound source performance with one violin are exactly the same as in the first embodiment, the description thereof is omitted here.

  In both the first and second embodiments described above, a stereo sound source performance is realized by two piezoelectric diaphragms, but if one piezoelectric diaphragm is fixed, monaural performance can be easily realized. Needless to say.

  In addition, it is obvious that if two violins with one piezoelectric diaphragm are prepared and played with R and L of stereo audio signals, separate stereo performance can be easily performed.

  On the other hand, for example, if a plurality of the piezoelectric diaphragms of the first embodiment are used, it is possible to perform multiplex performance of a single sound source that is multiplexed or recorded by using the above-described multiple tone generation characteristics of the violin.

  Furthermore, it is a matter of course that a wide-range musical performance can also be performed by a high-frequency musical instrument (for example, a violin) or a low-frequency musical instrument (for example, a cello) to which the one piezoelectric diaphragm is attached.

  By fixing two piezoelectric diaphragms corresponding to stereo audio signals to the violin piece, it can be easily set up at any location and can be applied to an automatic violin that performs stereo sound source performance.

It is explanatory drawing which showed the structure of the automatic violin, and the structure of a vibration part and a structure. (Example 1) It is explanatory drawing which showed the structure of the vibration part and structure which are attached to an automatic violin. (Example 2)

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vibration part 2 Piezoelectric diaphragm 3 Structure 4 ５ 5 pieces 6 Trunk

Claims (2)

  A single violin is an automatic violin that performs with a stereo sound source, a disc-shaped R piezoelectric diaphragm that vibrates in response to a stereo R audio signal and a disc-shaped L piezoelectric that vibrates in response to a stereo L audio signal. A rod-like structure that penetrates and fixes the center of the diaphragm to the skewer is fixed to the upper edge of the violin piece by a clip part provided at the tip, so that the R piezoelectric diaphragm and the L piezoelectric diaphragm are An automatic violin that uses a stereo sound source to excite the pieces simultaneously with each mechanical vibration.   One violin is an automatic violin that performs with a stereo sound source, one end has two branched ends, and each end vibrates in response to a stereo R audio signal. A violin piece in which the other end of the structure for fixing the central portion of the plate and the central portion of the disc-shaped L piezoelectric diaphragm that vibrates in response to the stereo L audio signal is detachable by a clip portion provided at the tip. An automatic violin that uses a stereo sound source to excite the pieces simultaneously by mechanical vibrations of the R piezoelectric diaphragm and the L piezoelectric diaphragm with a configuration fixed to the upper edge.

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